Nitrogen-doped cobalt nanoparticles/nitrogen-doped plate-like ordered mesoporous carbons composites as noble-metal free electrocatalysts for oxygen reduction reaction

• 来源期刊: 能源化学
• 年，卷（期）: 2017,（1）
• 页码范围: 63-71
• 页数: 9页
• 语种: 英文
• DOI: 10.1016/j.jechem.2016.07.005

摘要

In this work,nitrogen-doped cobalt nanoparticles/nitrogen-doped plate-like ordered mesoporous carbons (N/Co/OMCs) were used as noble-metal free electrocatalysts with high catalytic efficiency.Compared with OMCs with long channel length,due to more entrances for catalytic target accessibility and a short pathway for rapid diffusion,the utilization efficiency of cobalt nanoparticles inside the plate-like OMCs with short pore length is well improved,which can take full advantage of porous structure in electrocatalysis and increase the utilization of catalysts.The active sites in N/Co/OMCs for oxygen reduction reaction (ORR) are highly exposed to oxygen molecule,which results in a high activity for ORR.By combination of the catalytic properties of nitrogen dopant,incorporation of Co nanoparticles,and structural properties of OMCs,the N/Co/plate-like OMCs are highly active noble-metal free catalysts for ORR in alkaline solution.